I looked into this quite a bit and narrowed it down to the pros/cons between Korean with its rock solid commuting setup and very stable rosters. They are also exploring a form of reverse-scheduling with as few as two pilots in base. The downside is that their pay package is lagging and well overdue for a review.

China Southern or Hainan offer the big dollar contracts, but despite their growing demands I am hesitant to commit to either as a "career" move. With questionable medical licensing issues, and a punitive pilot culture I saw it as a matter of working 3-5 years, saving a lot of money, and moving on.

I have known people who were successful at both, and others who had negative experiences.